Acidita zrážok a jej dynamika vo vŕbovom ekosystéme
The work was aimed at monitoring the chemistry of precipitation after passing through the willow ecosystem. Precipitation samples were evaluated for 2 years. Most of the observed rainfall was acidic. The highest acidity of precipitation was recorded in an open area in continuous open collector (pH = 5.51). The lowest acidity was measured at throughfall willow ecosystem (pH = 5.77). Chemical analyzes of atmospheric precipitation have shown a slight increase in acidity. The great extremity of values (3.72 to 7.04) was found in pH results collected over the course of two years. According to the precipitation scale, the lower extreme pH falls to very acidic and the upper value to a neutral range. The lowest bottom pH was recorded in December in the open collector and the highest upper value in November in the same colletor. Except for actual acidity, the extremity of values has certainly a negative impact on the stability of forest and soil ecosystems. As for the individual annual periods, most acidic precipitation fell in the winter to the part-covering collector. In other seasons, precipitation were less acidic. The average pH values in individual seasons (spring, summer, autumn and winter) have occurred in the interval from 5.22 to 5.83 in the part-covering collector (K1), 5,01 – 5.81 in the opened collector (K2) and 5,32 – 6.00 in the collector in the willow ecosystem (K3). At assessing the resulting pH in the individual collectors, it can be concluded that the acidity of precipitation has not changed significantly. This natural relation is also confirmed by the average figures for the whole period. All average pH values lie in a slightly acidic region.
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